Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...144..124k&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 144, no. 1, March 1985, p. 124-132. Research supported by the National Researc
Astronomy and Astrophysics
Astrophysics
52
Cataclysmic Variables, Dwarf Novae, Eclipsing Binary Stars, Light Curve, Stellar Color, Stellar Spectrophotometry, Least Squares Method, Stellar Flares
Scientific paper
Extensive five-color photometry of OY Car in superoutburst is presented. The data are in accordance with the eccentric disk model proposed by Vogt (1982). In particular, the essential eclipse parameters including amplitude, asymmetry, and O-C deviation are shown to undergo secular and periodic variations corresponding to ingress and egress of a two-component disk configuration: a hot, inner circular disk surrounded by a cooler eccentric ring. The major axis of this ring precedes with the beat period within the Roche lobe of the primary. The data are consistent with ring formation about three days after the beginning of the eruption. The further development of the outburst is characterized by gradually decreasing luminosities of both disk components. The brightness of the eccentric ring declines more rapidly than that of the inner disk.
Krzeminski Wojciech
Vogt Nicolas
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